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阐述了基于拉曼背向散射和光时域反射(OTDR)技术的分布式光纤测温系统的原理。系统由测温主机、测温光纤和温度解调软件组成,具有灵敏度高、可靠性好、可准确测出光纤沿线温度及信息量大的特点。试验数据表明,系统测温精度高、定位准确,在电力和其他行业得到一定应用,具有工程有效性。
The principle of distributed optical fiber temperature measurement system based on Raman backscattering and optical time domain reflectometry (OTDR) is described. The system consists of a temperature measuring host, a temperature measuring optical fiber and a temperature demodulating software, which has the advantages of high sensitivity and good reliability, and can accurately measure the temperature along the optical fiber and the large amount of information. The test data show that the system has high accuracy of temperature measurement and accurate positioning, and has certain application in electric power and other industries and has engineering effectiveness.